Virtualization of Operating Systems

VIRTUALIZATION OF MACHINE

Installing CentOs (CentOS-6.2-x86_64) in VirtualBox within Ubuntu 11.10

(Do see the problem section in the end)

The following steps have been followed :-

1. Install virtualbox by the terminal

       sudo apt-get install virtualbox

2. Download CentOS ISO image

Download CentOS iso image. (http://wiki.centos.org/Download)

3. Create a virtual machine : -

• Click on “New“, Name - “CentOS 64 bit”. 
• Type - “Linux“, Version as “Others/Red Hat 64 bit“.
• Recommended Memory - 512 Mb
• Create a virtual Hardisk Now”
• Select Dynamically allocated“
• Give the size at least about 8Gb-10GB.
• On the Virtual Box Home Screen, press “Start“.
  

 

4. Installing CentOs on the Virtual Box

 

• Press "Start", click on the small folder icon and go to the location of the CentOs iso image file and click Start.
• Click NEXT in the next 2-3 steps which are used occasionally.
• Discard any data that exists in the hard disk that you created earlier for this VM. Continue as it will not discard your existing operation system.
• Enter a password for root user.

Error/Problem Section - 

I always face the most unexpected error. This time, I was getting an error while starting the virtual machine as -

this kernel requires an x86-64 CPU, but only detects an i686 CPU, unable to boot

Solutions - 

1. Recheck the bit of CentOs. Does it match with the bit you entered in first step of step 3..?? If no, create a new virtual machine or edit the existing one.

2. The problem I faced is this one. Restart the computer and go to the BIOS settings. Check whether the virtualization is enabled there or not? If no, enable it.

 Hope all's well..!!